Lady Heather, aka the brainy dominatrix with a heart of gold, returns in an April episode that focuses on a murder that takes place in Heather’s secret underworld. One in which rich people pay humans to be “their pets,” according to EW. Well, that kinda makes the “Furries” (people who dress up in “plushy” animal costumes) seem rather tame now, doesn’t it?

Somehow, Lady Heather becomes “professionally involved” in the case. But before you whip your panties in a bunch, Grissom will not pop up again for this case, unfortunately, despite his palpable chemistry with the leather-clad lady, which has made for an unusual, intriguing relationship between the two characters over the years.

Clarke last appeared on “CSI” in a November 2008 episode. Best known for her role as the MILF from Hell on “The O.C.,” Clarke now costars on The CW’s “Nikita” as a vixenish spy mentor.